🚀 go-pugleaf

Hi.

In the Intel '387DX Programmer's reference' you will read that
387 exceptions are raised when the NEXT copro-instruction comes. Well,
okay, then this program (written in TP6.0) should work:

asm
   fdivp
end;
writeln('Still alive!');
asm
   fwait
end;

After being blown up by the emulator it looks like this:

     wait
     fdivp
     call ....
     fwait

Now 'fdivp' divides by zero and divide-by-zero is unmasked: Still the
program should (according to the manual) write 'Still alive' onto the
screen and raise the exception when it comes to the fwait (there are
NO copro-instructions inside the WRITELN-subroutine).

Well, it doesn't.

When using the debugger you see the exception is raised right while
executing the fdivp, but this might be a 'Heisenberg effect' (things
change when you measure them ...)

Strange: This program works

    fdivp
    fnclex
    call ...
    fwait

Any ideas?

Gerd Kortemeyer